selinux: reject a class permission count below its inherited common
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.23
References 8
git.kernel.org
- stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3
- stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5
- stable/c/638213f2e6ea52c06a25861616781338d154db35
- stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7
- stable/c/a63011c009ea79439b800a05602b880eb4adbb05
- stable/c/acd5b09be98fd38b7392307880156fb0452a7276
- stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe
- stable/c/9a82dcd98b6e6e11cfd162410967951f12152528